Apparatus for applying threads on heating systems of textile machines

ABSTRACT

Apparatus for applying threads to thread-heating units having heated thread-contact surfaces above the normal human reach, which apparatus embodies a hand rod-operated block movable up and down and bearing a thread run-over member, and a pair of cables respectively attached at one end of each to the block and at the other end of each to a fixed member, one cable passing over at least one pulley on upper part of the rod and the other passing over at least one other pulley on the lower part of the rod.

United States Patent Bauer et al.

[ 51 Sept. 16, 1975 APPARATUS FOR APPLYING THREADS ON HEATING SYSTEMS OF TEXTILE MACHINES [75] Inventors: Karl Bauer; Herbert Streppel, both of Remscheid, Germany [73] Assignee: Barmag Barmer Maschinenfabrik Aktiengesellschaft, Wuppertal, Germany [22] Filed: Sept. 20, 1974 1211 Appl. No: 507,778

[30] Foreign Application Priority Data Sept. 26, 1973 Germany 2348322 [52] US. Cl. 57/106; 34/152; 34/162; 57/34 HS [51] Int. Cl. ..D02G 1/02; D01H 13/04; D021 13/00; F26B 19/00 [58] Field of Search 57/34 HS, 106, 157 TS; 28/62; 34/117, 120, 148, 152, 162, 236

[56] References Cited UNITED STATES PATENTS 3,094,761 6/1963 Dudzik 28/62 3,448,572 6/1969 Mcronen 57/106 3,636,697 1/1972 57/106 3,747,227 7/1973 34/236 3,842,578 10/1974 Schippers 57/34 HS Primary Examiner-John Petrakes Attorney, Agent, or Firm-Johnston, Keil, Thompson & Shurtleff 3 Claims, 3 Drawing Figures PATENTH] SEP 1 5 m5 II I mHm v 6 APPARATUS FOR APPLYING THREADS ON HEATING SYSTEMS OF TEXTILE MACHINES The crimping zone in false-twist'machines for crimping chemical fiber threads consists essentially of a sequence of a heating arrangement, a cooling zone and a false twist-apparatus. Through delivery mechanisms in front of the heating arrangement and behind the false-twist system the thread is conducted at a constant speed and constant thread tension through the crimping zone. After a second delivery mechanism there may be a further heating device which has the purpose of reducing the crimping extension. Such a false-twist crimping machine is known, for example, through Ger man published application OS 1,785,466. Through the striving to increase the thread running speeds, but nevertheless to achieve the required contact time for the heat transition between heating devices and chemical fiber threads, the heating arrangements in the meantime have reached such a length that their one end towers above the hand-reachable tending height. Tending height" in the context of the invention refers to the effective physiologically attainable reach of most human beings.

It should be mentioned that the height of the machine is further determined by the length of the cooling interval. Forced cooling is undesirable for technical and economic reasons, and the cooling preferably is accomplished by conducting the thread through an air space. In the case of an increase. of the thread running speeds, the air space also must be lengthened in order to provide sufficient air cooling time. This problem of the tending difficulties exists both in machines with only one heating device and also especially in the case of machines with two heating devices in series arranged one above the other, which are described, for example, in German published application OS 1,785,466.

The tending difficulties arise independently of whether the threadpath runs from the top downward, or from thebottom upward. In the German published application OS 1,785,466, with heaters accessible from the front side of the machine, and to which the threads can be applied from the front side of the machine, the problem is solved by a slidable hand rod with a thread applying guide. For the laying on of the thread, the hand rod is first brought into a lower position, the thread is laid in the applying guide and from there fed directly to the twist spindle. The hand rod is then brought into its operating position, the path of the hand rod being prescribed in such a way that the thread in the operating position passes into the operating range of the heating devicein this case a heating plate.

This device has proved successful without serious drawbacks up to a certain machine height. It is obvious, however, that the length of the hand rod is limited for reasons of practicality in tending.

The invention has as its object to provide applying devices consisting of a substantially vertically movable hand rod and a thread-applying guide movable in such a way that the applying of the thread is possible with heating arrangements or units whose thread-contacting surfaces tower over the tending height by more than the preferred or permissible length of substantially ver tical movement of the hand rod.

The invention provides a thread-applying guide on a slide block or member which slide block or member is moved up and down in a guide along the heating device by two cables, which are'fastened in each case to a fixed point on one end and to theslide block onthe other end=. One cable. is guided over at leastone upper pulley mounted onthe hand rod and the other is guided over at least one lower pulley also mounted on the hand rod.

The tending height can be further increased by using a cable-pulley system in which each cable is guided between its fixed end and its slide block end over multiple pulleys or blocks, whose pulleys, are in part fixedly mounted and in part are mounted on the hand rod. In order "to assure a constantly play-free operation of the thread-applying-device,. the cablespreferably are vheld applying device with multiple pulleys and mounting of the slide member on the hand rod.

In FIG. 1, there are represented merely a part of a thread heating'plate 14 as well as several fixed'p artsof the machine frame. The thread-applying device con-. sists of the hand rod 1 with hand grip 2. The hand rod. 1 is movable in vertical'direction in the guides-3 and 4 mounted onthe fixed, substantially vertical rod 6. The hand rod bears the cable-run-over pulleys '12 and 13. Another element of the thread-applying system is the slide block or member 5, which is slidable along the substantially vertical guide rod 6." The slide block or members carries the thread-applying guide consisting of a swinging lever7 and thread guide rolleror rollers 8, over which the thread 9 runs.

The slide block 5 is connected to respective ends of the cables 10 and 11, the respective other ends of which are fixedly attached to, for example, the machine frame. The cable 10 runs in V-fashion over the'deflec tion pulley 12 on the hand rod 1. The'cable ll runs'in inverted-V-fashion over the deflection pulley 13 on the hand rod 1. In the up-and-down movement of the hand rod 1 the slide block 5, therefore, moves with doubled speed and with doubled total length of movement relative to, and in the same direction as, the hand rod.

Upon upward movement of the slide block 5, the swinging lever 7 with its stop 15 abuts against a guide track or surface 16 whereupon the lever is swung into the position represented in the uppermost broken lines in FIG. 1, whereby the thread running over guide roll 8 comes into contact with the heating device 14. In this connection is is of no consequence for the functioning of the thread-applying system whether the thread running in contact with the heating device runs upward or downward. Likewise it is possible with the threadapplying device of FIG. 1 to conduct both the upwardly and downwardly running segments of the thread loop passing over the guide roll 8 over the heating device by arranging the axis of the thread guide roll 8 coaxially with or parallel to the swinging lever 7 and modifying the thread path correspondingly. Such possibilities of the thread path are described, for example, in German FIG. 3 is a schematicside elevation of a threadof the track or surface 16 is formed in such a way that l the length of the thread path does not change in the applying of the thread to the heating device and the thread tension remains constant (cf. German published application OS 2i 55 5 l4).

In FIG. 2 there is illustrated a cable holder bracket 17 which is fastened to the machine frame (not represented in FIG. 2) and forms one or both of the fixed points of the cables and 11 in FIG. 1. A sleeve 18 is slidable in thc cable holder and is movable in cables pull direction. One end of the cable, designated 19, is clamped in the sleeve. The sleeve is biased against the pull direction of the cable 19 by a coil spring '20, one end of which bears against a tension nut 21 threaded on the sleeve. By turning the tension nut with respect to the sleeve, the cable tension can be adjusted and, above all, readjusted on slackening of the cable.

FIG. 3 is a schematic view of the hand rod 1 guided in the guides 3 and 4 with hand grip 2 and cabledeflection pulleys 12', 12'' and 13', 13", preferably in coaxial pairs. The hand rod 1 serves simultaneously as guide for the slide block 5, on which, in turn, there is mounted the swinging lever 7 with the thread guiding run-over roll or rolls 8. The pulleys 12', 12'' and l3, l3" are allocated in each case respectively to the pulleys 22', 22" and 23', 23., which in turn are mounted on the machine frame, again preferably in coaxial pairs. Cable 10 runs from its fixed end on the machine frame, over the pulleys 12', 22, 12" and 22" to the slide block or member 5 and cable 1 1 runs from its fixed end onthe machine frame over pulleys 13, 23', 13" and 23" to the slide block 5. In this example, the slide block can cover a quadruple length of movement at quadruple speed with respect to the hand rod 1. v

. The double function of the hand rod in this embodi ment (as the bearer ofthe cable pulleys and as the guide for theslide block) is directly applicable and advantageous also for the embodiment with a cable guide system according to FIG. 1, because the double function arrangement provides considerable savings of space and structural simplification.

It is thought that theinvention and its numerous attendant advantages will be fully understood from the foregoing description, and it is obvious that numerous 4 Changes may bemade in the form, construction and arrangement of the several parts without departing from the spirit or scope of the invention, or sacrificing any of its attendant advantages, the forms herein disclosed being preferred embodiments for the purpose of illustrating'thc invention.

The invention is hereby claimed as follows:

1. Thread-applying apparatus for heating systems used on textile treating machines such as false-twist machines for the false-twist texturizing of threads of synthetic polymers and embodying heating devices across or through which the thread runs in a substantially vertical or a vertically diagonal direction and at least the upper end of which is above the manual reach or tending height, which thread-applying apparatus comprises a substantially vertically slidable hand rod and a thread-applying guide movably mounted by guide means for movement of the rod and guide up and down substantially parallel to the heating device between a lower tending position, in which the thread is applied, and an upper operating position, in which the thread runs in Contact with the heating device, the threadapplying guide being mounted on a slide member, said slide member being mounted on the rod or a separate, substantially vertical guide member for up and down movement adjacent the heating device, two cables respectively fixedly secured at one end and the other end of each being fastened to the slide member, and one cable running over upper pulley means mounted on the upper part of the hand rod and the other cable running over lower pulley means mounted on the lower part of the hand rod.

2. Thread applying apparatus as claimed in claim 1, wherein said upper and lower pulley means respectively include at least two pulleys, and wherein said cables respectively run over the pulleys of their respective I pulley means as well as additional fixedly positioned pulley means.

3. Thread applying apparatus as claimed in claim 1, and means holding the fixedly secured end of at least one of said cables under spring-bias to maintain tension in the cable and prevent development of slackening play therein. 

1. Thread-applying apparatus for heating systems used on textile treating machines such as false-twist machines for the falsetwist texturizing of threads of synthetic polymers and embodying heating devices across or through which the thread runs in a substantially vertical or a vertically diagonal direction and at least the upper end of which is above the manual reach or tending height, which thread-applying apparatus comprises a substantially vertically slidable hand rod and a thread-applying guide movably mounted by guide means for movement of the rod and guide up and down substantially parallel to the heating device between a lower tending position, in which the thread is applied, and an upper operating position, in which the thread runs in contact with the heating device, the thread-applying guide being mounted on a slide member, said slide member being mounted on the rod or a separate, substantially vertical guide member for up and down movement adjacent the heating device, two cables respectively fixedly secured at one end and the other end of each being fastened to the slide member, and one cable running over upper pulley means mounted on the upper part of the hand rod and the other cable running over lower pulley means mounted on the lower part of the hand rod.
 2. Thread applying apparatus as claimed in claim 1, wherein said upper and lower pulley means respectively include at least two pulleys, and wherein said cables respectively run over the pulleys of their respective pulley means as well as additional fixedly positioned pulley means.
 3. Thread applying apparatus as claimed in claim 1, and means holding the fixedly secured end of at least one of said cables under spring-bias to maintain tension in the cable and prevent development of slackening play therein. 